Added `domain` variable to Vagrantfile
Fixed phd service dependencies
Execute `php-fpm` as nginx daemon user
Enabled `tcp_nopush`
Set nginx charset
Renamed phabricator nginx logs
Simplified nginx config
Enabled `gzip_static` for nginx.

As per http://blog.zachorr.com/nginx-setup/
Enabled `gzip_vary` for nginx.

As per https://developers.google.com/speed/docs/best-practices/caching#LeverageProxyCaching
Set `gzip_comp_level` to 4.

As per http://blog.zachorr.com/nginx-setup/
Setup phabricator `local.json` config
Revert "Execute `php-fpm` as nginx daemon user"

This reverts commit 2d738c56730e178b13a869f0d83d81cd75580987.
Added `nginx::resource::upstream` resource
Disabled `server_tokens` in nginx.

As per http://www.if-not-true-then-false.com/2011/nginx-and-php-fpm-configuration-and-optimizing-tips-and-tricks/
Set nginx `gzip_types`
Set `gzip_proxied` for nginx
Enabled `catch_workers_output` for php-fpm.

As per http://www.if-not-true-then-false.com/2011/nginx-and-php-fpm-configuration-and-optimizing-tips-and-tricks/
Set php-fpm ping path
Set php-fpm status path
Use a socket instead of a TCP port for php-fpm